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Finding the Fourth Proportional to 38,929.70, 53,722.98 and 21,024.70

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Solution

The fourth proportional to 38,929.70, 53,722.98 and 21,024.70 is: 29,014.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,929.70 : 53,722.98 = 21,024.70 : x
  2. Step 2: Convert to fraction form
    38,929.70/53,722.98 = 21,024.70/x
  3. Step 3: Cross multiply
    38,929.70x = 53,722.98 × 21,024.70
  4. Step 4: Simplify right side
    38,929.70x = 1,129,509,537.61
  5. Step 5: Solve for x
    x = 1,129,509,537.61/38,929.70
  6. Step 6: Final answer
    x = 29,014.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.